package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;
import java.util.Set;

@Service
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;



    /**
     * 新增套餐，同时需要保存套餐和菜品的关联关系
     * @param setmealDTO
     */


    @Transactional
    @Override
    public void saveWithDish(SetmealDTO setmealDTO) {
        //对象转换
        Setmeal setmeal = new Setmeal();
        //拷贝属性                 拷贝源       目标
        BeanUtils.copyProperties(setmealDTO,setmeal);


        //把数据插入到套餐表中
        setmealMapper.insert(setmeal);
        //获得套餐的id
        Long setmealId = setmeal.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });

        //保存套餐和菜品的关联关系，调用SetmealDishMapper
        setmealDishMapper.insertBatch(setmealDishes);



    }




    /*
    * 套餐分页查询
    * */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        //获取 page页🐎  和 pageSize每页条目数
        int pageNum = setmealPageQueryDTO.getPage();
        int pageSize = setmealPageQueryDTO.getPageSize();

        //开启分页PageHelper
        PageHelper.startPage(pageNum,pageSize);

        //调用mapper方法
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);

        return new PageResult(page.getTotal(),page.getResult());
    }






    /*
    * 批量删除套餐
    * */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        ids.forEach(id->{
            Setmeal setmeal = setmealMapper.getById(id);
            if (StatusConstant.ENABLE == setmeal.getStatus()){
                //起售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });

        ids.forEach(setmealId->{
            //删除套餐中数据
            setmealMapper.deleteById(setmealId);
            //删除套餐菜品关系表中的数据
            setmealDishMapper.deleteBySetmealId(setmealId);
        });
    }




    /*
    * 套餐起售停售
    * */
    @Override
    public void startOrStop(Integer status, Long id) {
        //起售；先判断套餐中是否有停售菜品，有停售菜品提示”套餐中包含为起售菜品，无法起售“
        if (status == StatusConstant.ENABLE){
            List<Dish>dishList = dishMapper.getBySetmealId(id);
            if (dishList !=null && dishList.size()>0){
                dishList.forEach(dish -> {
                    if (StatusConstant.DISABLE == dish.getStatus()){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }
        Setmeal setmeal= Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }




    /*
    * 根据id查询套餐
    * */
    @Override
    public SetmealVO getByIdWithDish(Long id) {
        SetmealVO setmealVO = setmealMapper.getByIdWithDish(id);
        return setmealVO;
    }




    /*
    * 修改套餐
    *
    * */
    @Override
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        //对象转换
        Setmeal setmeal = new Setmeal();
        //拷贝属性
        BeanUtils.copyProperties(setmealDTO,setmeal);

        //调用setmealmapper层方法，修改套餐表
        setmealMapper.update(setmeal);

        //套餐id
        Long setmealId = setmealDTO.getId();

        //删除套餐和菜品的关联关系，调用setmealDishMapper层方法
        setmealDishMapper.deleteBySetmealId(setmealId);

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });

        //重新插入套餐和才菜品的关联关系
        setmealDishMapper.insertBatch(setmealDishes);


    }



    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
